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Dams Greater than 5MW Capacity in Columbia River Basin Data Ranking Wikipedia (accessed April 2021)

Capacity	Name	Height	State	Completion Year	Owner	Coordinates
527	Noxon Rapids Dam	260 ft (79 m)	Montana	1959	Avista	47o57'39''N115o44'01''W
255	Cabinet Gorge Dam	208 ft (63 m)	Idaho	1952	Avista	48o05'08''N116o03'27''W
71	Long Lake Dam	213 ft (65 m)	Washington	1915	Avista	47o50'14''N117o50'23''W
36	Little Falls Dam	57 ft (17 m)	Washington	1911	Avista	47o49'57''N117o55'04''W
26	Nine Mile Dam	58 ft (18 m)	Washington	1908	Avista	47o46'30''N117o32'38''W
15	Post Falls Hydroelectric Development	64 ft (20 m)	Idaho	1908	Avista	47o42'31''N116o57'13''W
15	Monroe Street Dam	24 ft (7.3 m)	Washington	1890	Avista	47o39'42''N117o25'31''W
10	Upper Falls Dam	35 ft (11 m)	Washington	1922	Avista	47o39'46''N117o24'55''W
1287	Rocky Reach Dam	130 ft (40 m)	Washington	1961	Chelan PUD	47o31'59''N120o17'41''W
660	Rock Island Dam	135 ft (41 m)	Washington	1933	Chelan PUD	47o20'33''N120o05'40''W
59.2	Lake Chelan Dam	40 ft (12 m)	Washington	1892–1903 / 1927	Chelan PUD	47o50'04''N120o00'45''W
22.6	Gem State Dam	40 ft (12 m)	Idaho	1982	City of Idaho Falls	43o25'19''N112o06'08''W
17.7	Upriver Dam		Washington	1894 / 1933	City of Spokane	47o41'09''N117o19'43''W
188	Seli’S; Ksanka Qlispe' Dam(Kerr Dam)	205 ft (62 m)	Montana	1938	CSKT's EKI: Tribal	47o40'38''N114o14'02''W
840	Wells Dam	160 ft (49 m)	Washington	1967	Douglas PUD	47o56'50''N119o51'51''W
104.5	Smith Dam (Smith River)	250 ft (76 m)	Oregon	1963	Eugene Water & Electric Board	44o0'0''N122o06'36''W
15.9	Leaburg Dam	20 ft (6.1 m)	Oregon	1929	Eugene Water & Electric Board	44o08'15''N122o36'43''W
10	Trail Bridge Dam	90 ft (27 m)	Oregon	1963	Eugene Water & Electric Board	44o16'24''N122o03'02''W
9	Walterville Dam	24 ft (7.3 m)	Oregon	1911	Eugene Water & Electric Board	44o03'36''N122o49'48''W
1092	Wanapum Dam	185 ft (56 m)	Washington	1963	Grant PUD	46o52'40''N119o58'13''W
955.6	Priest Rapids Dam	178 ft (54 m)	Washington	1961	Grant PUD	46o38'39''N119o54'36''W
585	Brownlee Dam	420 ft (130 m)	Idaho	1959 / 1980	Idaho Power Company	44o50'13''N116o54'03''W
450	Hells Canyon Dam	330 ft (100 m)	Idaho	1967	Idaho Power Company	45o14'34''N116o42'05''W
220	Oxbow Dam	175 ft (53 m)	Idaho	1961	Idaho Power Company	44o58'15''N116o50'07''W
82.8	C. J. Strike Dam	115 ft (35 m)	Idaho	1952	Idaho Power Company	42o56'51''N115o58'31''W
75	Bliss Dam	84 ft (26 m)	Idaho	1950	Idaho Power Company	42o54'49''N115o04'16''W
64	Shoshone Falls Dam	16 ft (4.9 m)	Idaho	1907	Idaho Power Company	42o35'47''N114o24'04''W
60	Lower Salmon Falls Dam	38 ft (12 m)	Idaho	1910 / 1949	Idaho Power Company	42o50'30''N114o54'54''W
52.9	Twin Falls Dam	25 ft (7.6 m)	Idaho	1935 / 1995	Idaho Power Company	42o35'21''N114o21'20''W
34.5	Upper Salmon Falls Dam	18 ft (5.5 m)	Idaho	1937 / 1947	Idaho Power Company	42o45'59''N114o53'45''W
25	Swan Falls Dam	107 ft (33 m)	Idaho	1901	Idaho Power Company	43o14'35''N116o22'46''W
70	Cowlitz Falls Dam	140 ft (43 m)	Washington	1994	Lewis County Public Utility District	46o27'59''N122o06'33''W
9	Magic Dam	128 ft (39 m)	Idaho	1910	Magic Reservoir Hydroelectric, Inc.	43o15'0''N114o22'12''W
59.5	Milner Dam	38 ft (12 m)	Idaho	1905	Milner Dam, Inc.	42o31'30''N114o00'35''W
94	Thompson Falls Dam	110 ft (34 m)	Montana	1915	Northwestern Energy	47o35'28''N115o21'03''W
240	Swift Dam	512 ft (156 m)	Washington	1958	PacifiCorp	46o04'48''N122o12'36''W
136	Merwin Dam	313 ft (95 m)	Washington	1931	PacifiCorp	45o59'24''N122o28'48''W
134	Yale Dam	323 ft (98 m)	Washington	1953	PacifiCorp	45o58'48''N122o20'24''W
6.85	Ashton Dam	56.6 ft (17.3 m)	Idaho	1913	PacifiCorp	44o04'12''N111o29'24''W
90	Box Canyon Dam	62 ft (19 m)	Washington	1956	Pend Oreille PUD	48o46'49''N117o24'46''W
15.18	Willamette Falls Dam	20 ft (6.1 m)	Oregon	1888	Portland General Electric, but... USACE owns Willamette Falls Lock	45o21'11''N122o37'04''W
247.12	Round Butte Dam	440 ft (130 m)	Oregon	1964	Portland General Electric Company, Confederated Tribes of the Warm Springs Reservation of Oregon	44o36'0''N121o16'12''W
100.8	Pelton Dam	204 ft (62 m)	Oregon	1957	Portland General Electric Company, Confederated Tribes of the Warm Springs Reservation of Oregon	44o41'24''N121o13'48''W
18.9	Pelton Reregulating Dam	88 ft (27 m)	Oregon	1958	Portland General Electric Company, Confederated Tribes of the Warm Springs Reservation of Oregon	44o43'12''N121o14'24''W
70	Swift No. 2 Dam	83 ft (25 m)	Washington	1959	Public Utility District No. 1 of Cowlitz County	46o03'46''N122o11'52''W
1040	Boundary Dam	340 ft (100 m)	Washington	1967	Seattle City Light	48o59'13''N117o20'53''W
300	Mossyrock Dam	606 ft (185 m)	Washington	1968	Tacoma Public Utilities	46o32'04''N122o25'29''W
162	Mayfield Dam	250 ft (76 m)	Washington	1963	Tacoma Public Utilities	46o30'10''N122o35'18''W

SUMMARY

20 Dams	>= 100 MW Capacity
17 Dams	< 100 MW and >= 25MW Capacity
11 Dams	< 25 MW Capacity
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48 Dams	> 5 MW Capacity in Columbia Basin

Related Links:
29 Dams in the Federal Columbia River Power System
Electricity in Idaho & the Northwest
Electric Sales and Revenue 1999